Dewey is a character appearing in Professor Layton vs. Phoenix Wright: Ace Attorney. He can usually be found around the Great Archive, where he helps out Ridelle Mystere. He is always carrying a large staple of books.


Dewey gives out the puzzle Baffling Bookcase. He also gives out the puzzle Stomp on it! to Phoenix Wright.



  • His name likely comes from Melvil Dewey who invented the Dewey Decimal System, a system to classify library books.
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